Super automatic espresso / coffee makers have a bean topper located on the top, designed for storing whichever beans you choose and feeding them right into the machine when you make a coffee or espresso drink.
Even though other bean types can be prepared conveniently, oily beans do not work well with super automatic coffee makers, as they often stick to its different parts, which eventually may spoil it.
Most super automatic machines warn you in the instructions to avoid oily beans. And if you’ve tried to use them anyway, you might have noticed that they get caught in the hopper and the grinder makes a high pitched whirring sound that indicates not enough beans made it into the grinding area. So with this in mind, you should be careful when choosing coffee beans, as many “espresso roasts” can be oily.
So as much as you might like your favorite coffee that tends to have oily beans, you need to avoid them so they don’t clog up your automatic espresso machines over time.
Here’s more information on why oily beans are bad for your automatic espresso machines and why you should avoid them.